One quarter of the total driving time the car drove at a speed of 60 km / h, and the remaining time
| March 17, 2021 | education
One quarter of the total driving time the car drove at a speed of 60 km / h, and the remaining time – at a speed of 160 km / h What is the average speed of the car along the way?
Data: t1 (duration of the first leg of the path) = 0.25t; V1 (vehicle speed on the first leg) = 60 km / h; t2 (duration of the second segment of the path) = 0.75t; V2 (speed on the second leg) = 160 km / h.
The average speed of the car along the entire path is determined by the formula: V = (S / t) = (S1 + S2) / t = (V1 * t1 + V2 * t2) / t = (V1 * 0.25t + V2 * 0.75t ) / t = 0.25V1 + 0.75V2.
Calculation: V = 0.25 * 60 + 0.75 * 160 = 135 km / h.
Answer: All the way, the car was moving at an average speed of 135 km / h.
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